[ZeGermanHam]

Originally Posted by Scarebird

Those steering arms - are the holes 1/2" or 7/16" Ø?



Pontiac spindles lower holes were 7/16" unless disc - I am curious whether Global West made them in both sizes...

Originally Posted by ZeGermanHam

Global West doesn't offer them in different sizes. They sell the same for all '64-72 GM A-Bodies, and they use 1/2" hardware. This means that if your spindles use 7/16" hardware to attach the steering knuckles, you will have to drill the holes out to 1/2". According to the paperwork that GW supplied, this applies to '64-67 A-Bodies, presumably more than just Pontiacs.

My car has all brand new suspension components and it's getting disc brakes, so I'm not sure what size bolts my new spindles use. I'll have to unbox them and check. Either way, it's an easy workaround.

To follow up on this, I just test fit the Global West steering knuckles on my CPP disc brake spindles. Both use 1/2" hardware, so no compatibility issues there. I know this info only helps people who have converted to discs, or are considering doing do. But hey, it's one more data point.